Gearing.



C. l, GREER.

GEARING.

APPLICATION FILED APR-5,1917.

1,238,284, PatentedAug. 28,1917.

3 snznwsnzsf 1.

C. l. GREER.

(BEARING;

APPLICATION FILED APR. 6. 1911.

"Patented Aug. 28, 1917.

3 SHEETS-SHEET 2- C. i. GREER.

GEARING.

APPLICATION FILED APR. 6. 1917.

Patented Aug. 28, 1917.

3 SHEETS-SHEET 3.

CHARLES I. GREEK, OF WASHINGTON, DISTRICT OF COLUMBIA.

Specification of Letters Patent.

GEARING.

Patented Aug. 28, 1917.

Application filed April 6, 1917. Serial No. 160,089.

To all whom it may concern:

Be it known that I, CHARLES I. GREER, residing at WVashington, in the District of Columbia, a citizen of the United States, have invented certain new and useful Improvements in Gearing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in gearing and more particularly to transmission gearing for automobile, gasolene and other engines, but which may be used equally as well for any other purpose to which it can be applied or adapted.

The object of the invention is to provide a gearing by which when changing the speeds the stripping of the gears will be entirely eliminated.

A further object is to provide a gearing which while being positively in gear at all times yet allows the gears to be put into and out of operation at the will of the operator.

A further object is toprovide a gearing so constructed and arranged that the speed may be changed as often as desired at any time or point from low to high and vice versa.

A further object is to provide a gearing by which the speed may be changed no matter what the position of the several gears with relation to each other may be.

A further object is to provide a gearing which will eliminate the slipping of the gears especially when used for large trucks and other heavy work.

A further object is to provide a gearing which has a minimum number of parts and a maximum amount of strength and which is not liable to get out of order.

A further object is to provide a gearing which is simple, inexpensive and durable in construction and convenient, easy and efiective in operation.

The invention consists in the several features and in the construction, combination and arrangement of features as more fully hereinafter described and claimed.

Referring to the drawings Figure 1 is a top plan view, partly in section, of my invention.

Fig. 2 is a side view of one of the operating levers r the clutc members and dable gearing.

Fig. 3 is a detail front view of a portion of one of the operating levers showing the means for attaching the clutch member.

Fig. 4 is a detail front view of a portion of one of the operating levers showing the pawl and the means for attaching the same.

Fig. 5 is a detail top plan view of one of the foot trips for the operating levers.

Fig. 6 is a face view of the stepped cone gear and the bevel gears by which it is driven.

Fig. 7 is a face view of the straight stepped driving gear and the slidable gear ing operated thereby.

In the drawings in which similar reference characters denote similar parts throughout the several views, 1 represents a suitable frame on which the several parts of my invention are adapted to be supported or mounted, 2 the drive shaft adapted to be operatively connected to any desired power for driving the same and mounted in suitable bearings in the frame 1.

A driving gear 3 having three stepped straight cog portions 4t, 5 and 6 is mounted on the drive shaft 2, and a driven cone gear 7 supported on a counter shaft 8 having bearings in the frame 1 is provided having inclined or beveled cog portions 9, 10 and 11 on one of its faces and an inclined or beveled cog portion 12 on its other face, and when used in connection with an automobile this shaft or axle will form or constitute the rear and driving axle of the same.

A plurality of longitudinally extending two part shafts, 13, 14C, 15 and 16, one part 13* slidable and the other part 13 nonslidable, are mounted in bearings on cross pieces 17 of the frame 1, the shaft 13 being provided at one end with a bevel gear 18 which meshes with the inclined cog portion 12 of the cone gear 7 and at the other end with a slidable straight gear 19 which meshes with the cog portion 4 of the driving gear 3; the shaft 14 being provided at one end with a bevel gear 20 which meshes with the inclined cog portion 11 of the cone gear 7 and at the other end with a gear 21 which meshes with the cog portion 4 of the driving gear 3; the shaft 15 being pro- ..vided at one end with a bevel gear which meshes with the inclined cog portion 10 of the cone gear 7 and at the other end with a slidabl straig t g ar wh ch meshes with the cog portion 5 of the driving gear 3, and the shaft 16 is provided at one end with a bevel gear 2a which meshes with the inclined cog portion 9 of the cone gear 7 and at the other end with a slidable gear 25 which meshes with the cog portion 6 of the driving gear 3.

The clutch on the shaft 13 is used when it is desired to reverse the gearing, in backing the automobile or other engine, the clutch on the shaft 14 being used for low speed forward, the clutch on the shaft 15 being used for a medium speed forward and the clutch on the shaft 16 being used for high speed forward.

In transmission gearing where the gears are bodily engaged and disengaged in changing from high to low speed and vice versa, to medium speed and in reversing, the gears become stripped and in order to obviate and entirely eliminate this stripping I provide gears which are constantly in gear at all times and which slide on and with relation to each other and operate them by means of a clutch mechanism connected to the shaft of each gear.

The clutch members '27, the slidable parts 13 of the two part shafts, and the gears 19, 21, 23 and 25 are all adapted to be operated by means of levers 80, operated by foot or hand, each of which is pivoted to a rod 31, at its lower portion, and pivoted to the clutch member 27 as at 32, and a spiral spring 33 is provided for retaining the lever in its normal position, one end secured to the lever and the other end secured to a lug 34: depending from the floor 35.

A curved rack 36 is secured to the floor 35 and is provided with a notch 37 with which the spring pawl 38, pivoted to the lever, is adapted to engage when the lever is thrown to the position it occupies when the clutch members are in engagement, and 39 is a trip having a spring 89 thereunder and pivotally mounted in suitable bearings 40 on the floor 35, and provided with a foot piece 41, adapted to 'be depressed by the foot of the operator, an upwardly projecting arm 42 adapted to throw the pawl 38 out of engagement with the notch 37 on the operation of the foot piece after which the spring 33 will pull the lever and cause the clutch members to engage.

lhe operation is so" apparent that it is not thought necessary to describe it.

I do not wish to be understood as limiting myself to the specific details of construction and arrangement as herein described and illustrated, as it is manifest that variations and modifications may be made in the features of construction" and arrangement, in the adaptation of the device to various conditions of use, without departing. from the spirit and scope of my invention and improvements.

I therefore reserve the right to all such variations and modifications as properly fall within the scope of my invention and the scope of the following claims:

hat I claim is 1. In a gearing, a stepped driving gear, a stepped driven gear, non-slidable and slidable intermediate gears operatively connecting said driving and driven gears and means for sliding the slidable gears and connecting and disconnecting them from operation with the non-slidable gears.

2. In a gearing, a stepped driving gear, a stepped driven gear, non-slidable and slidable shafts having gears and operatively connecting said driving and driven gears, and means for sliding the slidable shafts and conn ecting and disconnecting them from operation with the non-slidable shafts, thereby causing the. gears on the said shafts. to be put into and out of operation.

3. In a gearing, a stepped driving gear, a stepped driven gear, non-slidable and slidable intermediate means having elements permanently contacting with the driving and driven gears and operatively connecting said driving and driven gears and adapted to change the speed of the driven gear.

4. In a gearing, a stepped driving member, a stepped driven member, non-slidable and slidable members having elements permanently contacting with the driving and driven gears and operatively connecting said driving and driven members and means for sliding the slidable members and connecting and disconnecting them from operation with the non-slidable members.

5. In a gearing, a driving member, and a driven member each having a plurality of stepped cog surfaces, non-slidable and slidable shafts intermediate said members, gears on the non-slidable shafts meshing with the stepped surfaces of the driven member, and gears on the slidab-le shafts meshing the stepped cog surfaces of the driving member.

6. In a gearing, a stepped driving gear, a stepped driven gear, non-slidable and slida'ble shafts, a gear on each of the non-slidable shafts continually in mesh with the driven gear, a gear on each of the slidable shafts continually in mesh with the driving gear, clutches on the ends of said shafts, and means for engaging and disengaging the said clutches and sliding the slidable shafts and gears.

7. In a gearing, a driving gear, a driven gear, non-slidable and slidab-le shafts having gears meshing with the said driving and driven gears, clutches adapted to be operated to connect and disconnect said shafts, spring controlled levers for operating the clutches pivoted to said clutches and each provided with a pawl, adapted to retain the cl utches in their disengaged position, trips adapted to engage the pawls and disengage 13c them, and thereby causing the clutches to move and the slidable shafts with the gears thereon to slide.

8. In a gearing, a driving gear, a driven gear, a non-slidable and slidable shafts having gears meshing with the driving and driven gears, clutches operatively connecting the said non-slidable and slidable shafts and adapted to connect and disconnect said shafts, spring controlled levers for operating the clutches and pivoted to said clutches, spring controlled pawls pivoted to said levers, racks with which said pavvls are adapted to engage, spring trips for disengaging the paxvls from the racks and causing the engagement of the clutches and the sliding of the slidable shafts and the gears carried thereby.

9. In a gearing, a driving gear, a driven gear, non-slidable and slidable shafts having gears meshing with the driving and driven gears, clutches operatively connecting the non-slidable and slidable shafts and adapted to connect and disconnect said shafts, spring controlled levers for operating the clutches, spring controlled pawls pivoted to said 1e vers, racks With which said paWls are adapted to engage, spring trips having foot pieces and arms projecting therefrom adapted on the operation of the foot pieces to cause the said arms to trip the pawls and thereby causing the levers to move and cause the clutches to engage and slide the slidable shafts and their gears.

In testimony whereof I have affixed my signature.

CHARLES I. GREER.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0." 

